Many of the leftys rightly point to the 14th ammendment. That no state can deny equal protection under the law. They also like to say that scotus had no right to overturn roe, denying women the right to abortion, even though they thought it was OK when scotus created roe originally.
So, if the 14th ammendment is the argument you want to use here, and you also agree that scotus has the power to force states to perform abortions, then that also would mean that if scotus decided that Americans should enjoy gun reciprocity nationally, a right specified in the Constitution, and that no state can deny a citizen it's right to bear arms by denying them reciprocity across state lined, you're good with that?